Department of Animal Biology, University of Barcelona, Barcelona 08071, Spain.
Bull Environ Contam Toxicol. 2010 Jun;84(6):731-7. doi: 10.1007/s00128-010-0025-x. Epub 2010 May 11.
Blubber from stranded South American sea lions (Otaria flavescens) was sampled between 1991 and 2005 on the Peninsula Valdés in Argentina and analyzed for organochlorine (OC) pollutants. Mean blubber concentrations, expressed on an extractable basis, were 686 (SD = 1,060) ng g(-1) for dichlorodiphenyl trichloroethane (tDDT) and 735 (SD = 787) ng g(-1) for polychlorinated byphenils (PCB). The OC levels were well below those associated with adverse sublethal effects and lethality in mammals. OC concentrations showed statistically significant associations with age that were positive in males and negative in females. These trends are consistent with the majority of marine mammal populations studied. There were no trends in the levels of tDDT or PCB over time. In spite of the low levels detected, OC contamination was present consistently over the 14-year period, suggesting continuous inputs from geographic redistribution.
从 1991 年到 2005 年，在阿根廷的瓦尔迪兹半岛上采集了搁浅的南美海狮（Otaria flavescens）的鲸脂，并对其进行了有机氯（OC）污染物分析。以可提取基础表示的平均鲸脂浓度分别为滴滴涕（tDDT）686（SD=1060）ng/g 和多氯联苯（PCB）735（SD=787）ng/g。OC 水平远低于与哺乳动物亚致死和致死作用相关的水平。OC 浓度与年龄呈显著正相关，在雄性中呈正相关，在雌性中呈负相关。这些趋势与大多数研究的海洋哺乳动物种群一致。tDDT 或 PCB 的水平没有随时间的变化而变化。尽管检测到的水平较低，但 OC 污染在 14 年期间一直存在，表明存在地理再分配的持续输入。
